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671780-71-5

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671780-71-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 671780-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,1,7,8 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 671780-71:
(8*6)+(7*7)+(6*1)+(5*7)+(4*8)+(3*0)+(2*7)+(1*1)=185
185 % 10 = 5
So 671780-71-5 is a valid CAS Registry Number.

671780-71-5Relevant articles and documents

Synthesis of the o-Quinones and Other Oxidized Metabolites of Polycyclic Aromatic Hydrocarbons Implicated in Carcinogenesis

Harvey, Ronald G.,Dai, Qing,Ran, Chongzhao,Penning, Trevor M.

, p. 2024 - 2032 (2007/10/03)

Efficient new syntheses of the o-quinone derivatives of benzo[a]pyrene (BPQ), 7,12-dimethylbenz-[a] anthracene (DMBAQ), and benz[a]anthracene (BAQ), implicated as active carcinogenic metabolites of the parent polycyclic aromatic hydrocarbons (PAHs), are reported. These PAH quinones also serve as starting compounds for the synthesis of the other active metabolites of these PAHs thought to be involved in their mechanism(s) of carcinogenesis. The latter include the corresponding o-catechols, trans-dihydrodiols, and the corresponding anti- and syn-diol epoxides.

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